one word to sum up the movie, the butterfly effect...is angst.
feel drained mentally and emotionally from juz less than 2 hrs of it...

the morale of the story?

'the butterfly effect' describes how small and apparently insignificant incidents can set in motion a chain of events with far reaching consequences.

check out this site for more details:
http://www.obvious.fsnet.co.uk/butterfly/butterfly.htm

this theory sounds logical but if we were to consider each n every action of ours and how it affects everything else, we'll be merely existing and not living.